EP 0057953 A2 19820818 - Arrangement for correcting pulse distortion in homochronous data transmission.
Title (en)
Arrangement for correcting pulse distortion in homochronous data transmission.
Title (de)
Anordnung zur Korrektur der Impulsverzerrung bei homochroner Datenübertragung.
Title (fr)
Arrangement pour corriger la distorsion d'impulsions lors de la transmission de données homochrone.
Publication
Application
Priority
NL 8100650 A 19810211
Abstract (en)
In the duplex transmission of data signals over two-wire transmission paths the phenomenon of echo-signals is encountered, while simultaneously intersymbol interference occurs between the data symbols themselves. In order to reduce the influence of both the echo signals, and the intersymbol interference, the arrangement comprises a random access memory (16) which produces a correction value (c(i)) at each sampling instant to correct the received data signal. The memory is addressed from registers (13, 14) and a counter (15), the contents of the registers being determined by the data symbols transmitted last and the data symbols received last, respectively. A D-A converter (19) converts the correction value into a correction signal (c̃(t)), which in a difference producer (20) is subtracted from the received data signal. A sampling arrangement (21) samples the corrected received data signal. After D-A conversion (22) and multiplication (17) by a predetermined factor a each sample furnishes a number by which the correction value is changed to match it to the value of the pulse distortion at the sampling instant.
IPC 1-7
IPC 8 full level
H04L 5/14 (2006.01); H04B 3/06 (2006.01); H04B 3/20 (2006.01); H04B 3/23 (2006.01); H04L 25/03 (2006.01); H04L 25/08 (2006.01)
CPC (source: EP US)
H04B 3/231 (2013.01 - EP US); H04L 25/03038 (2013.01 - EP US); H04L 25/03057 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE FR GB IT SE
DOCDB simple family (publication)
EP 0057953 A2 19820818; EP 0057953 A3 19820825; EP 0057953 B1 19850522; CA 1181150 A 19850115; DE 3263583 D1 19850627; JP H039655 B2 19910208; JP S57152253 A 19820920; NL 8100650 A 19820901; US 4464746 A 19840807
DOCDB simple family (application)
EP 82200095 A 19820127; CA 395603 A 19820204; DE 3263583 T 19820127; JP 1770482 A 19820208; NL 8100650 A 19810211; US 34298482 A 19820126